1) Appearance : white or off-white powder 2) Specific viscosity ( 1% in butanone solution ): 0.1-0.5/0.5-1.0/1.0-1.5/1.5-2.5/2.5-4.0 3) Loss on drying: ≤2% 4) Active: ≥98% 5) Residual maleic anhydride: N/A 6) Packaging: 17kg or 20kg/fibre drum 7) HS code: 3907209090